Phone validation

so i have to do a e-mail and phone number validation, i looked it up online but could someone explain me what this piece of code means(its for the phone validation)

/^\+?([0-9]{2})\)?[-. ]?([0-9]{4})[-. ]?([0-9]{4})$/;

This piece of code is an incorrect regex pattern: https://en.wikipedia.org/wiki/Regular_expression

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

Please use the “preformatted text” tool in the editor (</>) to add backticks around text.

See this post to find the backtick on your keyboard.
Note: Backticks are not single quotes.

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